Flush tank



`lune 9, 1925. 1,540,890

s. c. LAWSON FLUSH TANK Filed March 31. 1920 Patented June 9, 1925.

UNITED STATES SAMUEL C. LAWSON, OF CROTONTON-HUDSON, NEW YORK.

FLUSH TANK.

i Application led March 31, 1920. Serial No. 370,129.

To' all whom it may concern: i

Be it known that I, SAMUEL C. Lawson, a citizen of the United States, residing at Croton-on-I-Iudson, in the county of Testchester and State of New Yori, have invented certain new and useful Improvements in F lush Tanks; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this description, in which similar characters responding parts in all the views.

The object of this invention is to provide a siphon valve for use in connection with flush-tanks which shall consist of a minimum number of parts and, at the saine time have a. maximum eiiiciency in operation. Further objects of the invention are durability of the same and quietness of operation.

Fig. l is a sectional elevation of one form of my improved flushing apparatus;l Fig. 2 is a section on the line 2 2 of F ig. l.

As illustrated in the drawings, the flushing apparatus comprises a tank A, of any approved construction, the inlet thereto not being herein shown. Within the tank and extending downwardly is the outlet pipe B, there being a portion B leading'to the bowl or other place to which water'is to be supplied, and an upper portion B2, extending upwardly into the tank and surrounded by a circular shell C. This shell is made stationary relatively to the tank. Itis open at its lower end and closed at its upper end, where it has a circular depression, C', ooncentric with the upper end of the outlet pipe B. The purpose of the depression C in the shellC is to direct the flow of water into the outlet pipe B, as will hereinafter more. fully appear. The shell is also provided with ports G2. Surrounding the upper pipe B2 and movable thereon is a sleeve D, wideningat its upper end into a cup D. To the lower end of the sleeve D are rigidly connect-ed two radially extending arms E, having vertical movement with the sleeve D in the slots F, In the outer ends of reference indicate corof the arms E are perforations E for connection with bail G, which latter 1s connected to the usual mechanism IVI for.raisthe posit-ions shown in dotted lines,y The effect of raising the interior cupV D is to lift the water within and to fill the upper portion of the circular shell C and to' start a flow down the pipe B, being assisted over the top of the pipe BV by the concentric depression C in the shell C. A siphoning Voperation is hereupon established, and conf tinues until broken by the water in the tank being lowered beneath the topV of the ports C. 1

What I claim is:

l. A flushing apparatus comprisinga supply tank, a stand-pipe extel'iding into said tank, a stationary air-chamber surrounding the upper portion of said stand-piperand having water inletsr adjacent to its lower end, and provided, on opposite sides, with slots, a sleeve surrounding the outlet pipe and tapering outwardly therefrom to form a cup and means extending through said slots for operating lifting the water within the casing and causing a siphoning flow from the outlet pipe; l

Q. A flushing apparatus comprising a sup` Ply tank, a stand-pipe'extending into said v8() said sleeve and cup for.

tank, a stationary air-chamber surrounding the upper portion of said stand-pipe and having water inlets adjacent to its lower end, and provided, on oppoeitesides, with slots, a sleeve surrounding the outlet pipe andtapering on its upper end outwardly therefrom to form a cup and means lei:- tending through said slots for operating said sleeve and cup for lifting-the water within the casing` and causing a' siphoning flow from the outlet pipe. 

